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IBM AIX: openssh_advisory13 (CVE-2019-6111): Vulnerabilities in OpenSSH affect AIX

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IBM AIX: openssh_advisory13 (CVE-2019-6111): Vulnerabilities in OpenSSH affect AIX

Severity
6
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:P)
Published
01/31/2019
Created
07/18/2019
Added
07/17/2019
Modified
11/07/2019

Description

An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).

Solution(s)

  • ibm-aix-openssh_advisory13

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